evening vs time period

evening and time period both are nouns.

Word	Noun	Adjective	Verb	Adverb
evening	Yes	No	No	No
time period	Yes	No	No	No

As nouns, time period is a hypernym of evening; that is, time period is a word with a broader meaning than evening:

Other hypernyms of evening include period, period of time.

As nouns, time period is a hypernym of evening; that is, time period is a word with a broader meaning than evening:

evening: the early part of night (from dinner until bedtime) spent in a special way
time period: an amount of time

Other hypernyms of evening include period, period of time.

evening (noun)	time period (noun)
the latter part of the day (the period of decreasing daylight from late afternoon until nightfall)	an amount of time
a later concluding time period
the early part of night (from dinner until bedtime) spent in a special way